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Figure 24
Figure 25
EXAMPLES - TOP vENT RUN
24” MINIMUM CLEARANCE
TO COMBUSTIBLES
24”
H2
H1
V1
Example
H2= 2ft
2 - (90° + 90°)= 6ft
H= 8ft V= 15ft
3 ft (914 mm) H3- 1 ft (305mm) = 4 ft (122mm)
6 ft (1.83M)
21 ft (6.4M)
10 ft (3M) V =21ft (6.4M)
2’ MIN.
VERTICAL PIPE
Figure 26
RECESSED LOCATION
OUTSIDE CORNER
INSIDE CORNER
“A” = COMBUSTIBLE 9” (229mm)
= NONCOMBUSTIBLE 2” (51mm)
“F” = COMBUSTIBLE 6” (152mm)
= NONCOMBUSTIBLE 6” (152mm)
BALCONY
WITH PERPENDICULAR SIDE WALL
BALCONY
WITH NO SIDE WALL
“C” = CLEARANCE FROM CORNER
IN RECESSED LOCATION
COMBUSTIBLE 9” (229mm)
NONCOMBUSTIBLE 2” (51mm)
“D” = MINIMUM WIDTH FOR BACK WALL
OF A RECESSED LOCATION
COMBUSTIBLE 38” (965mm)
NONCOMBUSTIBLE 24” (610mm)
“E” = MAXIMUM DEPTH OF 48” (1219mm)
FOR RECESSED LOCATION
“G” = COMBUSTIBLE 9” (229mm)
= NONCOMBUSTIBLE 2” (51mm)
“H” = COMBUSTIBLE 18” (457mm)
= NONCOMBUSTIBLE 12” (305mm)
“I” = COMBUSTIBLE 12” (457mm)
= NONCOMBUSTIBLE 12” (305mm)
Example:
H2 = 2ft
2 - (90°+90°) = 6ft
H = 8ft V = 15ft
Example:
H2 = 3ft (914mm) H3 - 1ft (305mm) = 4ft (122mm)
(90°+90°+90°) = 6ft (1.83M)
V1 = 21ft (6.4M)
H = 10ft (3M) V = 21ft (6.4M)
